Emergency workers toiling to clean up an oil spill in the Black Sea have detected seven new slicks, a Russian official told the TASS state news agency on Friday, as authorities struggle to mitigate the effects of the nearly month-old disaster.

Fresh oil started pouring from a stricken Russian tanker in the Black Sea on Friday, said officials in Moscow, as Ukraine warned of "terrible environmental consequences" from the spill.

Russian President Vladimir Putin said on Thursday that more needed to be done to clean up an oil spill in the Black Sea, saying efforts so far appeared to have been insufficient to deal with the ecological disaster.

Russian President Vladimir Putin has decided to establish a headquarters to manage the aftermath of the tanker accident in the Kerch Strait. This reaction from the Kremlin leader appears demonstrative,

Russian President, Vladimir Putin, on Thursday, faulted the clean-up of a major oil spill in the Black Sea and created a new task force to take over the operation, almost four weeks after the spill commenced.